should a 11 year old take gummy vitamin d? also is it normal for there hair to fall out if they don't have enough vitamin d?

Which of these glands is NOT an exocrine gland?

Carbon forms many complex molecules because it has

A large amount of algae in a lake is a result of: A. global warming B. rain forest destruction C. phosphate and nitrogen pollution D. a decrease in the number of decomposers

What episode wiped out many insect species in the world?

New biosensors, applied like a temporary tattoo to the skin, can alert serious athletes that they are about to "hit the wall" and will find it difficult to continue exercising.

Simulations are useful for understanding how natural processes work but are not always representative of the real world. How does this simulation differ from what might happen in a true ecosystem?

Metamorphic rock with A handed appearance due to the alignment of minerals are

What results when the combined effect of two different drugs taken together exceeds the sum of the individual drugs administered alone?

Animal lays eggs with a tough leathery watertight shell

Why is DNA antiparallel? It has double strands complementing each other. The bases in one strand pair with the other bases in the complementary strand. It has a ladder shape. Its double strands run in opposite directions.